英语练习题无标准答案的 （L2)

英语练习题无标准答案的 （L2)
3.Fill in the blanks with the correct words and – if necessary – change the grammatical form:
consist of,either,enable,failure,linked,provide,disconnect,above,indicate,pull
a.If there is a ________ in one of the systems,the plane must be grounded.
b.The cockpit crew _________ a captain,a first officer and – on some planes – a flight engineer.
c.Before you start the test,make sure you _________ electrical power.
d.A knowledge of the English language ________ you to understand the Manuals.
e.The pressure must not be __________ 25 psi.
f.Before you _________ the IDG system,read the instructions carefully.
g.The opposite of “push” is ________.
h.The computer ________ the malfunctions of the system.
i.With the help of a contactor the busses can be _______.
J． “You can choose ______ procedure” means that is doesn’t matter which one you choose.
4.Fill in the correct prepositions:
of,to,below,by,to,on,at,for,to,before,via,without
a.Do not actuate the switch ______ longer than 5 seconds.
b.Allow a minimum ______ 60 seconds _______ repeating the test.
c.Pull the lever ______ the extreme left position.
d.The disconnect must not be actuated if the engine is running ______ idle speed.
e.In normal flight each IDG supplies its own distribution network _____ its line contactor.
f.The direct current normal and essential busses are linked ______ a tie contactor.
g.You do the operational test ______ check the IDG disconnect system.
h.Starting the engine _______ resetting the disconnect could result in damage ______ the dog teeth.
i.If you do not follow the instructions,the jaw teeth may seal _____ the IDG input shaft.
j A “click” can be felt _______ the end of the travel.

第二题太复杂
a.failure
b.consists of
c.disconnect
d.enable
e.above
f.linked
g.pull
h.indicates
i.provied
j.either
a.for
b.
c.
d.below
e.via
f.
g.to
h.by to
i.
j.at